Gilmour 1/2" Hose Male Coupling, Polymer. This durable coupling is designed to repair or replace a damaged or worn-out coupling on a 1/2" hose. It features a patented impact-resistant clamp design, non-corroding high-grade stainless steel screws, and is manufactured using the highest level of quality control. Leakproof and reusable, this coupling can be used with rubber or plastic hoses. If the end of your hose is crushed, corroded, or worn, simply cut off the old coupling and attach the new one.